Basic HTML Version
458
Location : on right bank at the bridge.
Amphoe
Phra Nakhon Si Ayutthaya
Changwat
Phra Nakhon Si Ayutthaya
15,830 sq.km.
WATER YEAR : 2011
PASAK RIVER BASIN
Pasak River at Panchamathirat Uthit Hospital , Phra Nakhon Si Ayutthaya (S.5)
Lat 14 - 21 - 32 N Long 100 - 35 - 02 E
Drainge Area
Ban
Panchamathirat
Water - stage recorder
+0.000 m. (MSL.)
B.M.-H.D.
On right bank near the gage site.
Elevation
Recording
Arithmetic means of 24 readings
2008 to date
Rating Operation
Period of Available Gage Records
Basis of Mean Daily Gage Height
Gage Reading Frequency
Zero Gage at Bottom
+7.220 m. (MSL.)
Type of Gage
Bench Mark
Location BM
2008 to date
-
2008 to date
Fairly stable.
Overbank flow starts at elevation +5.620 m.(MSL.), records are channal flow only.
Records good. Stage-discharge relation defined by 22 discharge measurements made in 2011.
Rated by Current Meter
Stability of Channel Regimes
Overbank Flow Conditions
General Description
Period of Rating
Rated by Flot
Date
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Annual
----------
-----------------
1
0.68
0.90
1.76
1.46
2.56
3.39
4.91
5.47
3.59
0.80
1.28
1.82
2
0.62
0.92
1.78
1.50
2.69
3.53
4.95
5.42
3.41
1.00
1.26
1.36
3
0.52
0.94
1.98
1.54
2.69
3.61
5.04
5.39
3.27
1.10
1.28
1.08
4
0.46
0.96
2.02
1.56
2.58
3.64
5.18
5.36
3.14
1.12
1.32
1.44
5
0.52
0.98
1.94
1.68
2.49
3.66
5.25
5.32
3.01
1.08
1.42
1.02
6
0.48
1.08
1.88
1.68
2.35
3.66
5.46
5.28
2.89
0.97
1.24
1.34
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Gage Height in Meter (MSL.) Water Year April 1, 2011 to March 31, 2012
7
0.58
1.16
1.82
1.84
2.23
3.64
5.66
5.26
2.79
0.92
1.20
1.18
8
0.56
1.32
1.90
1.94
2.08
3.64
5.75
5.23
2.72
0.86
1.42
1.04
9
0.68
1.48
2.04
1.78
1.89
3.63
5.80
5.20
2.62
0.75
1.36
0.84
10
0.28
1.40
2.00
1.78
1.90
3.71
5.84
5.17
2.54
0.70
1.48
1.02
11
0.58
1.32
1.96
1.30
1.91
3.97
5.87
5.15
2.00
0.64
1.48
1.02
12
0.74
1.18
1.98
1.39
1.96
4.30
5.87
5.13
1.80
0.54
1.68
1.14
13
0.64
1.24
1.88
1.75
2.07
4.48
5.85
5.09
1.75
0.51
1.34
1.02
14
0.60
1.32
2.06
1.68
2.13
4.55
5.83
5.04
1.50
0.48
1.36
1.34
15
0.74
1.54
1.98
1.80
2.19
4.50
5.82
4.96
1.31
0.45
1.48
1.68
16
0.72
1.38
2.10
1.52
2.29
4.41
5.78
4.89
1.25
0.44
1.72
1.62
17
0.72
1.56
2.10
1.56
2.42
4.32
5.89
4.81
1.23
0.42
1.98
1.68
18
0.60
1.42
1.64
1.78
2.52
4.30
5.89
4.74
1.18
0.52
1.68
1.40
19
0.55
1.36
1.58
2.08
2.61
4.31
5.90
4.68
1.10
0.64
1.44
1.34
20
0.70
1.86
1.56
1.50
2.69
4.35
5.89
4.62
1.04
0.72
1.04
1.24
21
0.80
1.88
1.64
1.51
2.77
4.39
5.89
4.56
0.99
0.88
1.28
1.04
22
0.84
1.86
1.48
1.56
2.76
4.42
5.88
4.48
0.96
1.00
1.24
0.84
23
0.78
1.68
1.62
1.65
2.77
4.47
5.86
4.40
1.01
1.12
1.18
0.78
24
1.04
1.68
1.58
1.80
2.75
4.55
5.85
4.30
0.99
1.28
1.12
0.28
25
1.10
1.88
1.30
1.87
2.69
4.63
5.82
4.18
0.99
1.40
1.12
0.08
26
1.28
1.64
1.18
1.96
2.64
4.71
5.80
4.05
0.95
1.46
1.32
0.32
27
1.25
1.58
1.54
2.06
2.63
4.76
5.73
4.00
0.84
1.54
1.26
0.32
28
1.26
1.16
1.42
2.14
2.59
4.80
5.66
3.96
0.90
1.44
1.27
0.38
29
0.98
1.32
1.32
2.30
2.59
4.87
5.62
3.84
0.95
1.33
1.28
0.20
30
0.80
1.56
1.68
2.38
3.00
4.92
5.56
3.72
0.80
1.41
0.18
31
1.64
2.41
3.21
5.52
0.75
1.37
0.02
----------
--------------
Mean
0.74
1.39
1.76
1.77
2.47
4.20
5.67
4.79
1.75
0.93
1.36
0.97
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Max
1.28
1.88
2.10
2.41
3.21
4.92
5.90
5.47
3.59
1.54
1.98
1.82
5.90
Min
0.28
0.90
1.18
1.30
1.89
3.39
4.91
3.72
0.75
0.42
1.04
0.02
0.02
5.91
m. (MSL.) ,
0.00
m. (MSL.) ,
River Bed -8.93
m. (MSL)
5.61
m. (MSL.) ,
7.22
m. (MSL.) ,
Drainage Area 15830 Square Kilometers
at 15.00 Hours , on Oct 17 , 2011
Annual Max Momentary Gage Height
Zero Gage at Bottom Elevation
Right Bank Elevation
Left Bank Elevation